Drilling machine



A. H. TRUMBULL DRILLING MACHINE Flled 'July le, 1920 2 sheets-*shew l 2 sheets-sheet 2 ATTORNEY Patented Mar. 27, 1923.

UNITED STATES Lain PATENT oFFlcE.

ALEXANDER H. TRUMBULL, OF STRATFORD, CONNECTICUT, ASSIGNOR TO THE CON- NECTICUT ELECTRIC MFG. COMPANY, OF BRIDGEPORT, CONNECTICUT, A CORPO- RATION' OF CONNECTICUT.

DRILLING Application filed July 1,

T all whom t may concern:

Be it known that l', ALEXANDER H. Tuna;- BULL, a citizenr of the United States, residing at Stratford, county of F airfield, State of Connecticut, have invented an improvement in Drilling` Machines, of which the following is a specification.

This invention has for one of its objects to provide a drilling machine which shall be equipped vwith a drill spindle head that is both adjustable on the head of the machine and is removable therefrom. A further object of the invention is to provide a machine of the present character the head of which is arranged to accommodate a plurality of drill spindle heads which are each adjustable on said head and removable therefrom, and the drill spindles of all of which are adapted to be rotated by a single 2o driving means. A still further object is to produce a novel drill spindle head which is capable of being adjusted longitudinally o n the head of a drilling machine and is adapted to be removed from said head.

l/Vith the above and other objects in view, the invention comprises the construction, arrangement and combination ofv parts -as now to be fully described and hereinafter specically claimed.

In the accompanying drawing forming a part of this specification,

Fig. 1 isa side elevation of the complete machine;

Fig. 2 a top plan view;

Fig. 3 an end view looking from the right in Fig. 1; n c

Fig. l a sectional view on line -fl m Fig. 43, looking in the direction of the arrows;

Fig. 5 a sectional view on line 5-5 in Fig. 3,v looking in the direction of the arrows;

Fig. 6 a detail View disclosing the inanner of attaching the adjustable hand lever; and j Fig. 7 is a sectional View on line 7--7 in Fig. 6.-

10 denotes the head of the machine Yand 11 the pedestal base by which the head is supported. The head and pedestal base are each provided with flanges, denoted by 12 and 13, respectively, and are additionally provided with webs 14( to act as braces for the flanges. The head and its iangey are MACHINE.

1920. Serial No. 396,829.

secured to the base and its flange by means of screws 15.

The head of the machine is adapted to carry a plurality of drill spindle heads 16, whichare ofk novel structure' and are capable of being adjusted on the machine and removed therefrom, and is provided with a single driving means which is adapted to rotate all of the drill spindles no matter what may be the adjustedpositions of the drill spindle heads on the head of the machine. The head of the machineis provided with a horizontal portion 17 on which the drill spindle heads are arranged in any ordinary-or preferred manner so that they are capable of sliding longitudinally of said horizontal portion and can be removed therefrom. As shown, I nro-vide the horizontal portion with obliquely arranged, spaced apart projections 18. for this purpose. The body of each drill 'spindle head, as shown more clearly in Fig. 3, is cut away as indicated aty 19 to accommodate the obliquely arranged and spaced apart projections, and is provided with a drill spindle 2O which is keyed to a spiral gear' 2l arranged in said body. Ball bearings 22 and washer 28, nut 24 and loclr nut 25 are for the purpose of locating the drill spindles in the bodies of the spindle heads and allowing their rotation. 26 denotes drill chucks adapted to be secured tothe drill spindles, and 27 denotes drills adapted tor be carried by said chucks. As shown more clearly in Figs. 3 and 4, each spindle head body is also provided with a spiral gear 28 which is mounted in said body so as to be perpendicularly arranged with respect to the spiral gear keyed to the drill spindle and is adapted to mesh with said last men.- tioned spiral gear. As ydisclosed in Figs. 2 and 3', I provide each spindle head body with a clamp 29 which is adapted to engage a gib 30 arranged upon the upper surface of one of projections 18 to. lock the spindle heads tothehorizontal portion of the head of the machine.

It will be apparent that when spiral gears 28 are rotated, rotationwill be imparted to spiral gears 2l, and consequently to the drill spindles. The means shown for imparting rotation to spiral gears 28 is a shaft 31 which isarranged in proximity to the horizontal portion Vofthe head of the machine and is adapted to slidably pass through an opening in each one of spiral gears 28, shaft 31 being provided with a keyvvay 32 and each of spiral gears 28 carrying a key 33 which is adapted to be located in said keyway. Shaft 31 may be rotated in any ordinary or preferred manner. I preferably utilize a motor 34 for this purpose, the shaft of the motor being connected to shaft 31 in any suitable manner, as indicated at 35. 36 denotes Wires leading to the motor, 37 a switch panel secured to the flange of the head of the machine. 38 an electric switch, and 39 a controller box -for controlling` the motor.

The horizontal portion of the head ofthe machine `is immovable, the material to be either a hand lever or a foot pedal.

drilled being moved upwardly against the drills by means of a table Which is preferably constructed and operated as now to be described. Referring to Figs. 1 and 5, 40 denotes a vertically arranged slide plate which is secured to the pedestal base by means of a pair of clamps 41 and is provided with a pair of dovetailedpways '42. A rack 43 secured to the vertical slide. plate' by means of screws 44 is for a purpose to be explained. The table of the machine consists of a top portion 45 and a web portion 46, both of which are cutaway as suggested in Fig. 5to kaccommodate rack 43 andvto provide corresponding dovetailed ways adapted to fit the dovetailed Ways of the vertical slide whereby the table is adapted to be slidablyysecured to the vertical plate, and is'controlled by means of a small spur gear 47 which is adapted to engage rack 43 and is rigidly secured to a shaft 48 rotatably mounted in the Web of the table as indicated at 49. The smallspur gear may be caused to rotate yto `move the table upwardly ly i s shown more clearly in Figs. 1 and 5, a larger spur gear 50 rigidly carried by a shaft 51 rotatablymounted in the web of the table as indicated at 56 is arranged to mesh with the small spur gear, and is adapted to be oscillated by means of a. hand lever 52 which. is adjustably secured to said` shaft, as is more clearly shown in Figs. 6 and 7. A pin 53 passing through the hand lever and into the center of' the end of the shaft Vaffords a pivotal connection, and a removable pin 54'adapted to enter small openings 55 in said end affords means for locating' the hand lever. As disclosed more clearly in Figs. 1 and 5,.a lever 75 is rigidly secured to shaft 48, a link 57 is pivotally secured to the lever as indicated at 58, and a foot pedal 59 Which is pivoted tothe pedestal base asindicated at 60 is pivotally secured to the link as indicated lat 61. Shafts 48 and 51 maybe located in the web in any desirable manner. As shown in Fig. 5, shaft 48 is locatedby means cfa `double collar 76 provided with a cross pin 77'Which passes through said shaft, and shaft 51 is located by a pair of collars 78 provided with cross pins 79 Which vlikewise pass through the shaft. Lever 75 is provided nearits free end With a counterxveight 62 whichA serves an obvious purpose. A limit rod 63, Whichv 1 assist in the proper positioningof the mate` rial to be drilled. As shown more clearly in Fig. 3, the table top is provided in its side edges with Ways 66 which are adapted to accommodate projecting portions 67 of the gauge, denoted by 68, which is arranged toslidelongitudinally upon the top of the table. The gauge is adapted to be Xedly secured to the table at any desired location.

For this purpose, I provide a. T-head bolt y 69 which is arranged in a T-slot 70 extendf ing the length of the table.` The'T-head bolt passes through a hole in the gauge'and is engaged by a Wing nut 71. The gauge, the table land the horizontal portion of the head of the machine are each preferably provided with a graduated scale, denoted by 72, 73 and 74, respectively.

As hereinbefore.mentioned, anyl desired number of drill spindle heads may lbe'placed on the horizontal portion of the head of the machine at any desired locations and caused to 'be rotated by a single driving means, as by the leyway shaft fully described. The machine of the invention is, consequently, especially adapted for the simultaneous drilling of a multiplicity of holes Which are to be located at any desired distances from each other.. The drillspindle heads are adapted to be accurately positionedpby4 llO ments of the drill spindle heads and thev Y material are thus cared for. The graduated scale on the lsliding gauge is for the purpose of adjusting the material transversely with respect to the tabl-e and the drill spindle heads. l v

As shown in Fig. 1, the table is in its lowermost position, the upper stop nuts" resting against the stop bracket and the hand lever, foot pedal and counterwe-ightbeing in their uppermost positions, and material, denoted by A, to be drilledis locatedupon the table and arranged against the sliding gauge. The motor is started and the drills are thus made to rotate.

`rac-lr 43 and cause the table to be slid upwardly on the vertical slide plate so that the material may be entered by the drills. When the lever or pedal is released, the weight vof the table will return it to its lowermost position, as will be apparent.

It is to be understood that the matter hereinbefore set forth is merely descriptive of the principles of the invention, .suoli changes in details of construction and arrangement of parts being permissible as fall within the spirit of the invent-ion and within the scope of the appended claims.

Having fully described my invention, I claim:

l. In a machine of the character described a support, a drill spindle head adjustable on said support7 said head having spaced bearings therein, a drill spindle carried by said head, a gear on said spindle, a shaft extending through the said bearings, a gear -l slidable onsaid shaft having driving connection therewith and located between said bearings whereby it is adjustable with said head, said gear meshing with the first 1nentioned gear, said support and shaft being free and unobstructed at one end thereof to allow mounting and disinounting of the head without tearing down the machine, and means for rotating the shaft.

2. In a machine of the character described, a support having horizontally extending guideways open at one end, a drill spindle head slidably mounted in said guideways and adapted for insertion in and removal from said guideways at said open end, a drill spindle carried by said head, a horizontally extending shaft, a bearing for the shaft carried by said head, means carried by said head and having driving connection with said shaft for rotating said spindle, said shaft being free and unobstructed at its end adjacent the open end of the guideways in the support whereby the heads may be removed from t-he support without tearing down the machine.

3. In a machine of the character described, a support having horizontally extending guideways open at one end, a drill spindle head slidably mounted in said guideways and adapted for insertion in and removal from said guideways at said open end, a drillv spindle carried by said head, a horizontally extending shaft, a bearing for the shaft carried by said head, and intermeshing gears carried by said head and adjustable therewith, one of said gears being secured to said spindle and the other having driving connection with said shaft, said shaft being free and unobstructed at its end adjacent the open end of the guideways in the support wherebv the heads may be removed from the support without tearing down the machine.

4. In a machine of the character described, a machine head provided with ways, a drill spindle head having corresponding ways and adjustable on the machine head, a drill spindle rotatably mounted in the spindle head, intermeshing spiral gears mounted in said head, one of said gears being secured to said spindle, a shaft extending through the spindle head, spaced bearings for the shaft carried by the head, and. means forming driving connection between said shaft and the other gear, said latter gear being located between the spaced bearings and having sliding connection with the shaft, said shaft being free and unobstructed at its end adjacent the open end of the guideways in the support whereby the heads may be removed from the support without tearing down the machine.

In testimony whereof I affix my signature.

ALEXANDER H. TRUMBULL'. 

